Provide the source code for the following ASP.NET problem:

A common mathematical function is the factorial function. The factorial function takes an integer input n that is greater than or equal to 1 and computes n * (n-1) * ... * 2 * 1. In mathematical texts, factorial is denoted with an exclamation point, as in n!. For this assignment, write a function called Factorial that takes a single Integer input and returns an Integer corresponding to the factorial of the inputted parameter. To help get you started, your function will look like this:

Function Factorial(n as Integer) as Integer

' Write code here to compute n!

' Return the value n!

End Function

Note the following:

1! = 1

2! = 2 * 1 = 2

3! = 3 * 2 * 1 = 6

4! = 4 * 3 * 2 * 1 = 24

5! = 5 * 4 * 3 * 2 * 1 = 120

After you have written this Factorial function, add a Page_Load event handler that calls the function, displaying on the ASP.NET web page the values of 1! through 5!. Hint: The Factorial function will need to contain a looping construct from 1 to n, where, at each iteration, a variable is multiplied by the value of the looping variable.